Nailing-machine



2 Sheets-Sheet 1.

(No Model.)

A. K-NOWLTON. NAILING MACHINE Patented Aug. 2,1881..

2 om T Lw WM 0G Nm KL (No Model.)

-N0. 245,077. Patented Aug. 2,1881.

UNITED STATE-s PATENT OFFICE.

ALBION'KNOWLTON, BOSTON, MASSACHUSETTS.

SPECIFICATION,-`formng part of Letters Patent No. 245,077, dated Augustl` 2, 1881.

' Application filed June 2, 1881. (No model.)

To all whom it may concern:

Be it known that I, ALBION KNowL'roN, of Boston, Suffolk county, State of Massachusetts,

have invented certainnew and useful Im provements in Nailing-Machines, of which the following is a specification. My invention relates to that class of machinery' for nailing boots and shoes, in which means for feeding a continuous wire and cut.

ting the same into proper nail-lengths arecom; bined with a driver which drives the nails so cut into theboot or shoe, and it has particular referenceto the wire-feeding mechanism. I

employ for the purpose of feedingV the wire feed-rolls which are combined with instrumen4 talties whereby the rolls haveimparted to them causing the feed of the wire, andthe extent of 1 -the rearward or return movement determining *the length of feed; and I also combiuewittt said rolls means whereby,before thecommencet ment of their return movemenntheyvare sepa-l rated so as to release their hold on the wire; and after the completion of said return move-f mentare permitted to again cometogether and v close upon 4the wire. The feed device thus ort ganized possesses, as will be seen, in a general way the characteristics of a four-motion feed.

This, ofcourse, is not new, broadly considered,

with me, my invention residing in the combi-f nation and arrangement of instrumentalities, substantially as hereinafter described,whereby I impart to clamping feed-rolls the saidmotions.

Thenature of my inventiomand the manner in whichithe same is or may be carried into effect,will be understoodby reference to the accompanying drawings, inv which- Figure 1 is a perspective view of so much of a boot'and shoe nailing-machine as needed to illustrate my improvements. Fig. 2 is a sectional side elevationof the same. Fig. 3 is a front elevation of the same. Fig. 4 is a view of the movable feed-roll and shaft and springsupportin g bracket detached. Fig. 5 is a view of a portion of themain shaft and shoe-feed lever and adjacent cams thereon. Fig. 6 is a view of the sliding cutter-bar detached. Fig. 7 is a side elevatioirof the upper part of the shoe-feed lever. A

Like letters indicate like parts in the several figures.

A is the frame of the machine; B, the main shaft; C, the driver-bar, with its driverD moved in one direction by cam E, and in opposite direction by a spring, which is not shown. Fis the shoe-feed lever, which encircles at its upper endan eccentric, a, on shaft B, and moves on a fulcrum adjustable in the slot b for the purpose of regulating the length of feed. The wire passes from a bobbin (not shown) down back of the cam E, through a passage, b', terminating in a fixed steel tube, c, (shown detached on the right of Fig. 3,) under the lower end of which moves thereciprocatingcutter-bar G, operated to move in one direction by means of cutter-bar lever H and cam I on shaft B, and in the otherv direction by means of spring J. The parts thus far described are combined and arranged to operate as usual in machines of this class, and require no further description here.

The wire-feedin g instrumentality consists of two rolls, d e, having their contiguous faces grooved, or otherwise formed, to receive'and hold the wire which passes down between them. Roll d is mounted to revolve on a pin Iixed to the frame of the machine. Roll cis fixed on a short shaft, f, which is journaled in a springsupporting bracket, K, fixed to the machineframe' and adapted to permit the roll e and its shaft to move to and from the other roll. The spring-bracket normally holds roll e with clamping-pressureagainst roll d. The rear end of shaft f is provided with two arms, g h. To the Vone, g, isV attached a spring, t', fixed at the other end ofthe machine-frame. The Vsprin g is under tension, and tends to rotate the shaft in one direction, the extent of movement in this direction being determined by the thumb-screw j, which screws through a bracket on the frame and has its upper end undery the arm g, this upper end being surmounted by a cushion, j', of wood or other sound-deadening material. The other arm, h, is a wiperarm,whicl1 is acted on by cam 7c on shaft B. By the action of this cam upon the arm the feed-roll shaft is rotated in 4a direction opposite to that in which it is moved by the spring i.

Upon the hub of the shoe-feeding lever which encircles the eccentric a, on shaft B is an enlargement or projection, l, which, duringvthe IOO . to permit the feedrolls toinove apart the requisite distance without throwing the teeth out of gear.

The parts are so timed to move relatively to one another that at the proper moment the cam It will act on the wiper-arm h to rock the feed-shaft f in the direction requisite for the feed of the wire. This movement will be imparted to the feed-rolls, which at this time are closed upon the wire, and they will consequently feed down the wire a predetermined distance, the lower end ot' the wire passing from the steel tube c into a corresponding open ing in the cutter-bar beneath, where it is operated ou and disposed of in the usual way. The cam is of such length. as to hold the rolls in this position until, during the oscillatory' movement of the shoe-feeding lever, the projection l comes opposite to and bears against the spring-bracket K to such an extent as to separate the feed-rolls. At this instant the arm his released from control of its cam, and the spring i at once acts to partially rotate the shaft in the opposite direction, returning the Shaft and the feed-rolls to the position from which they started, the extent of this rearward or return movement being determined by the position of the adjustable or regulating thumbscrew j. As soon as the parts are returned to this position the projection l ceases to act on the spring-bracket, and the feed-rolls once more close upon the wire to again feed it forward at the proper time, as above described.

It will thus be seen that I obtain a wire-feed device consisting of clamping feed-rolls geared together so as to be positively driven in unison, and having at definite intervals movement to and from one another for the purpose of grasping and releasing the wire, and movement of partial rotation alternately in opposite directions for the purpose of feeding the wire forward a predetermined distance, and returning to the position from which they started in order to take a fresh hold on the wire; and the organization of parts by which these various movements are imparted to said rolls is such as to combine strength and efficiency with simplicity, eompactness, and economy.

Having described my invention, and the manner in which the same is or may be carried into effect, what I claim, and desire to secure by Letters Patent, is-

l. In a nailing-machine for boots and shoes, wire-feed rolls geared together so as to move in unison, in combination with actuating mechanism, substantially as described, whereby the said rolls are caused to move to and from one another and to rotate on their axes alternately in opposite directions at the times and in the manner substantially as specified.

2. The feedrolls geared together so as to move in unison, in combination with the feedshaft carrying one of said rolls, the shaft-supporting bracket, the two arms fixed to said shaft, the spring t', and the cam 7c, arranged and operating' substantially as hereinbei'ore set forth.

3'. The combination, substantially as hereinbefore set forth, of the feed-roll d, the feed-roll e, geared thereto, the feed-shaft f, the arms g h, the cam 7c, the spring i, and the adjustable regulating-screw j.

4. The feed-roll shaft f and spring-bracket K, in combination with the oscillatory shoefeeding lever, and enlargement or projection Z thereon, substantially as and for the purposes Set forth.

5. The feed-rolls geared togetherand mounted one-on the machineframe and the other on a rotatable shaft providedv with drivers, as described, in combination with the shaftsupportingspringbrackct, the oscillatingshoefeeding lever and enlargement thereon, the spring and the rotating cam for giving movement to said shaft, and the adjustable regulating-screw, the combination being and acting' substantially as hereinbefore set forth.

In testimony whereof I have hereunto set my hand this 1st day of June, A. D. 1881.

ALBION KNOVLTON.

Witnesses:

E. A. DICK, N. C. LANE. 

